{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x55be5fef59777eac75322ef6d7620f1455b015fb23d1c3a4e5d84727541316da",
    "signature": "0x18176c4f754fe5e64fccb63e2f3517f2e707921b04e58b81bbac3558b9e953a910ba6936d2d4f049198d7dd3792334fe4e08c968767a2a819612696a1cf3cab61b",
    "signer": "0xADF54C2e8AeE384a9540e524eDCAd6621F64612D",
    "userId": "518758857"
  }
}